4412.51.31.21 - With a face ply of walnut (Juglans spp.)

This HTS classification, 4412.51.31.21, specifically covers plywood products where the visible outer ply is made from walnut (Juglans spp.). This material is characterized by its rich grain patterns and varied color tones, ranging from light brown to deep dark brown. The classification implies that the plywood is not surface-covered in a way that would obscure these natural features of the walnut face ply, nor is it covered by a clear or transparent material.

Distinguishing this category from its siblings, we find it differentiated by the specific species of wood used for the face ply. For instance, it differs from 4412.51.31.11 which is for plywood with a face ply of Spanish cedar, and from 4412.51.31.41 which is for mahogany. This particular subcategory is for any plywood meeting the preceding criteria, but with a face ply of walnut, falling into the "Other" category when compared to those specific named tropical woods.

As this is a leaf node in the HTS classification system, there are no further subcategories. Therefore, the focus remains on accurately identifying plywood with a walnut face ply that meets the criteria of not being surface-covered or being covered by a material that clearly reveals the grain, texture, or markings of the walnut. This ensures precise classification for import and export purposes.